基于故障分量的配电网单端量测距方法

为了消除负荷电流对配电网单相接地故障测距精度的影响,提出了基于故障分量的单端量测距方法。该方法根据横向故障电流的特征构造了测距函数,利用线路单端电压、电流的故障分量来计算故障距离。大量的ATP-EMTP仿真结果表明该方法不受负荷电流的影响,可以有效地搜索到配电网多分支线路的故障点或故障范围。

An accurate single terminal fault location algorithm based on fault components for power distribution system

To remove the effect on the line-to-ground fault location of power distribution system by load current,an accurate single terminal fault location algorithm based on fault components is proposed in this paper.The algorithm constructs a fault location function according to the characteristic of fault current,and the fault location is directly calculated by using fault components of voltages and currents derived at only line head.It has been conformed that the algorithm can locate the fault or fault area effectively by a lot of simulations on fault lines with ATP-EMTP,and is not influenced by the load currents.